Twin coinical screw barrel for pvc extrusion profile machinery

Qunying is one of the best machinery parts supplier in China.We are the most history and famous screw barrel brand in China.And having professional and experienced teams in every department in our company,we cooperate with many machine factories.Waiting for you,you best choice! Technical Parameters for conical screw barrel: 35/75, 45/90, 45/100, 50/105, 51/105, 55/110, 55/120, 58/124, 60/125, 65/120, 65/132, 68/143, 70/135, 70/140, 75/150, 80/143, 80/156, 92/188 Grade available: 1. Standard grade: 38CrMoAlA + nitriding 96 hours 2. Bimetallic grade: 38CrMoAlA + bimetallic alloy 3. TC-A grade: Tungsten carbide 40% 4. TC-B grade: Tungsten carbide 25% 5. TC-C grade: Tungsten carbide 9.5% Or other according to requirement, we are rich experience in producing and designing! Product conical screw barrel Material 38 CrMoAlA(JIS SACM645); 42 CrMo(AISI 4140) Cr12MoV(JIS SKD-11);4Cr5MoSiV1(JIS SKD-61) Nitrided Hardness HV900°~1000° Hardness after hardening and tempering HB260 ° Nitrided Depth 0.5~0.7mm Nitrided Brittleness above 2 stage Surface Roughness Ra0.4 Screw straightness 0.015mm Hardess of surface chromium-plating after Nitriding HV≥950HV Chromium plating Depth 0.05~0.10mm Alloy Depth 0.8~3.0mm Alloy hardness HRC56°~65° Alloy(bimetallic) iron,nickel,tungsten,molybdenum Types of screw barrel Gradual type,mutant type,wave type,barrier type,double screen type,shunt type,separation type,exhaust type,pin type,mixed type,double-head type,three-head type,multi head type etc.